Late 1999 iMac G3

Late 1999 iMacDevelopment of the slot loading “Kihei” iMac began the day after the first iMac shipped. The new model is an evolutionary development of Apple’s 2,000,000 unit best seller and requires Mac OS 8.5 or later.

The new iMac design boasts slot-loading CD-ROM and DVD-ROM drives, a 100 MHz system bus, RAGE 128 graphics on a 2x AGP bus, a Harmon Kardon sound system (with an optional subwoofer), and support for Apple’s 802.11b AirPort Card (optional adapter required). The new case design allows for air cooling (just like the old Mac Plus and Volkswagen Beetle), so there’s no cooling fan. The new model is a bit smaller and lighter than the tray-loading iMacs, and this was the first time the iMac was available in more than a single speed.

The 350 MHz entry-level model is available only in blueberry, has a CD-ROM drive and 6 GB hard drive, and is the only member of this family that doesn’t include a FireWire port. It shipped with 64 MB of RAM, expandable to 1 GB.

The 400 MHz iMac DV is available in the same five colors as the Revision C and Revision D iMacs. It includes a 10 GB hard drive, a DVD-ROM drive, and a FireWire port, which provided support for external hard drives, CD- and DVD-burners, Apple’s iSight webcam, and more.

At the top of the line is the 400 MHz iMac DV Special Edition, available exclusiverly in graphite. It is distinguished from the DV model by its color, a 13 GB hard drive, and the inclusion of 128 MB of RAM.

Mac OS 9

  • If you are running Mac OS 9.1 or later, iMac Firmware Update 4.1.9 should be installed. If you are using Mac OS X, you must boot from a Mac OS 9.1-9.2.2 writeable partition (not a CD or network disk) prior to updating. You cannot update to OS X 10.3 or later unless you first install Firmware Update 4.1.9.
  • For more information on firmware updates, see iMac: When to Install Available Updaters.

Mac OS X

Non-Apple upgrades and peripherals (such as unsupported USB devices, replacement drives, and third-party memory) may cause problems when installing or booting into Mac OS X.

Be sure to read and follow Apple’s “Read Before You Install” install instructions to increase the likelihood of getting OS X installed and running on the first try.


  • introduced 1999.10.05.
  • Requires Mac OS 8.6 through OS X 10.4.x Tiger
  • CPU: 350/400 MHz PPC 750
  • Bus: 100 MHz
  • RAM: 64/128 MB, expandable to 1 GB using two PC100 SDRAM (3.3 V, 64-bit, 168-pin, 100 MHz)
  • Video: supports resolutions of 640 x 480, 800 x 600, and 1024 x 768 using ATI RAGE 128 VR chip set and 2x AGP, has VGA port for external monitor, which can only display same resolutions as internal monitor
  • Display: 15″ CRT (13.8″ viewable) multiscan to 1024 x 768
  • L2 cache: 512 KB 160 MHz (5:2) backside cache
  • Hard drive: 6/10/13 GB EIDE drive. Maximum IDE drive size is 128 GB without third-party support. See How Big a Hard Drive Can I Put in My iMac, eMac, Power Mac, PowerBook, or iBook? for your options.
  • CD-ROM: 24x (350 MHz model)
  • DVD-ROM: 4x (400 MHz models)
  • SCSI: none
  • PCI slots: none
  • USB: 2 separate USB 1.1 ports and controllers
  • FireWire 400: 2 ports
  • Modem: built-in v.90 56k modem
  • Ethernet: 10/100Base-T
  • WiFi: 802.11b AirPort Card, requires AirPort Card Adapter
  • Microphone: internal
  • Power supply: 150W
  • PRAM battery: 3.6V half-AA
  • Height: 15.0 in/38.1 cm
  • Width: 15.0 in/38.1 cm
  • Depth: 17.1 in/43.5 cm
  • Weight: 34.7 lb/15.8 kg
  • family numbers: M5521
  • Model identifier: PowerMac2,1

Online Resources


  • You cannot plug the iPod shuffle directly into the iMac’s USB port – it will not fit. It will not charge if plugged into a keyboard USB port or an unpowered USB hub. To charge it while using it with your iMac, you must us a USB extension cable, powered USB hub, iPod shuffle dock, or a USB power adapter.
  • Update Firmware Before Installing Jaguar!, Geoff Duncan, TidBITS, 2002.10.28. If your firmware isn’t at version 4.1.9, you need to boot into OS 9.1 and install it before attempting to install Jaguar (OS X 10.3) on your slot-loading CD-ROM or DVD iMac.
  • You must have the keyboard plugged directly into an iMac USB port to boot with the power key; it will not work if the keyboard is attached to a hub.
  • You cannot boot the iMac from an external USB drive.
  • The iMac loads the MacOS Toolbox into RAM, unlike other Macs which use it from ROM. You lose the use of 3 MB of memory but gain faster performance.